Sauces for Grilled Cod: 8 Recipes That Elevate It

Grilled cod is one of those dishes where the product speaks for itself: a good desalted fillet, the right amount of salt, a searing that maintains its juiciness, and little else. But between a decent grilled cod and a memorable one, there's usually just one thing: the sauce. A good sauce for grilled cod adds fat, acidity, or a hint of garlic that envelops the flakes and rounds out the bite without overpowering the fish's flavor.

Here, we won't explain the grilling technique—for that, you have our guide to juicy grilled cod (temperature and time). This is a collection of accompanying sauces: eight options, from the most classic to the most indulgent, each with its mini-recipe for you to choose according to the day and what you have in your pantry.

Why a good sauce elevates grilled cod

Desalted cod is a lean fish with a clean flavor. Grilling gives it texture and a slight char, but being low in fat, it can be a bit dry if served alone. That's where the sauce comes in, fulfilling three functions:

• Adds creaminess: olive oil emulsions (pil pil, ajada, beurre blanc) compensate for the leanness of the fillet.
• Balances with acidity: a vinaigrette or a touch of vinegar or lemon cuts through the fat and brightens the overall dish.
• Adds aroma: garlic, parsley, bell pepper, or pepper envelop the flakes and add depth.

The key: the sauce accompanies, it doesn't drown. Serve it underneath or beside the fillet, not excessively on top, so the cod maintains its seared surface. Start with a good product: in our selection of desalted cod, you'll find thick fillets, ideal for grilling.

1. Light Pil Pil

The quintessential Basque sauce, in a quick version to accompany grilled dishes. A silky emulsion of oil, garlic, and the cod's own gelatin.

Ingredients: 150 ml extra virgin olive oil, 3 sliced garlic cloves, 1 chili pepper (optional), the gelatin released by the cod.

1. Confit the sliced garlic in oil over low heat until lightly golden. Remove and set aside.
2. Let the oil cool slightly. Gradually add the cod's gelatin/juice and move the saucepan in circles (back and forth) to emulsify.
3. When it thickens and becomes creamy, spoon over the grilled cod and garnish with the garlic. If you want to delve deeper, you have the secret to the pil pil emulsion in detail.

2. Green Sauce

Parsley, garlic, and oil: green sauce is light, herbaceous, and pairs wonderfully with cod. For grilling, we use it more fluid, like a warm dressing.

Ingredients: 4 tablespoons olive oil, 2 minced garlic cloves, 1 good handful of chopped fresh parsley, 1 tablespoon flour (optional, to thicken), 150 ml fish broth or water, salt.

1. Sauté the garlic in oil over low heat without burning. Add the flour and cook for one minute.
2. Pour in the broth little by little, stirring until a thin sauce forms.
3. Off the heat, add the parsley to retain its color and freshness. Sauce the cod. You can find the stewed version in our recipe for cod in green sauce.

3. Express Vizcaína Sauce

Traditional Vizcaína sauce requires hours of cooking onions and choricero peppers. This express version retains its sweet and red character in much less time, perfect for topping a grilled fillet.

Ingredients: 2 poached onions, 3 tablespoons choricero pepper pulp (or ñora), 1 garlic clove, 100 ml broth, a drizzle of oil, salt.

1. Poach the onion and garlic slowly until tender and golden.
2. Add the choricero pulp and sauté for a couple of minutes. Deglaze with the broth and cook for 10 minutes.
3. Blend and strain for a fine, shiny texture. Serve under the cod. For the full version, see our cod with Vizcaína sauce.

4. Galician Ajada

Ajada (or ajeite) is the Galician sauce of oil, garlic, and paprika used to dress fish and potatoes. Simple, robust, and with an unmistakable flavor.

Ingredients: 6 tablespoons olive oil, 4 sliced garlic cloves, 1 teaspoon sweet paprika, ½ teaspoon spicy paprika (optional), 1 tablespoon wine vinegar.

1. Brown the sliced garlic in oil over medium heat until golden, without burning.
2. Remove from heat, wait a few seconds, and add the paprika, stirring quickly (it shouldn't burn or it will taste bitter).
3. Finish with vinegar to add acidity. Drizzle over the still-hot grilled cod.

5. Beurre Blanc

The French sauce of butter, white wine, and shallots. Elegant, silky, and with a touch of acidity that goes perfectly with a thick cod fillet.

Ingredients: 100 ml dry white wine, 2 tablespoons white wine vinegar, 1 minced shallot, 100 g cold butter in cubes, salt and white pepper.

1. Reduce the wine, vinegar, and shallot over medium heat until 2-3 tablespoons of liquid remain.
2. Lower the heat to minimum and incorporate the cold butter cube by cube, whisking continuously to emulsify and prevent it from boiling.
3. Strain if you want a smooth sauce, season with salt and pepper, and serve warm under the cod. Do not reheat strongly or it will curdle.

6. Romesco

The Catalan sauce of bell pepper, nuts, and bread, originating from Tarragona. It provides body, toasted sweetness, and a touch of acidity that pairs wonderfully with grilled fish.

Ingredients: 2 ñoras (or 2 tablespoons of pulp), 1 roasted tomato, 1 roasted garlic, 30 g toasted almonds, 20 g toasted hazelnuts, 1 slice of fried bread, olive oil, vinegar, and salt.

1. Hydrate the ñoras and extract their pulp. Roast the tomato and garlic.
2. Blend the nuts with the bread, ñora pulp, tomato, and garlic.
3. Emulsify by adding oil in a stream and adjust with vinegar and salt. It should be thick, not liquid. Serve a spoonful next to the fillet.

7. Roasted Garlic Mayonnaise

Milder than raw aioli, roasted garlic mayonnaise has a sweet and deep flavor that doesn't linger. A cold sauce that contrasts with the hot cod.

Ingredients: 1 roasted garlic head, 1 egg, 200 ml mild oil (sunflower or blend), 1 teaspoon lemon juice, salt.

1. Roast the garlic head wrapped in foil at 180 °C for about 30-40 minutes, until the pulp is creamy. Extract the pulp.
2. Make mayonnaise with the egg and oil in a blender, adding the oil little by little.
3. Add the roasted garlic pulp and lemon, adjust salt, and blend until combined. Serve a quenelle next to the cod.

8. Bell Pepper Vinaigrette

The freshest and lightest option in the collection. A warm roasted bell pepper vinaigrette that provides color, sweetness, and acidity without being heavy.

Ingredients: 1 red and 1 green bell pepper, roasted (or from a jar), 4 tablespoons olive oil, 1 tablespoon Sherry vinegar, ½ minced spring onion, parsley, salt.

1. Peel and dice the roasted bell peppers into small cubes. Also mince the spring onion.
2. Mix with oil, vinegar, parsley, and salt. Let it rest for 10 minutes for the flavors to meld.
3. Serve at room temperature or slightly warm over or around the grilled cod.

How to choose the sauce for the occasion

If you're looking for Basque tradition, go for pil pil or green sauce. For something with body and color, the express Vizcaína or Romesco. If you want elegance, beurre blanc. And for days with less cooking, ajada, roasted garlic mayonnaise, or bell pepper vinaigrette are prepared in minutes. All start from the same base: a well-desalted and well-grilled cod fillet.

The pairing also adds up: a full-bodied white wine (Albariño, Godello) accompanies both fatty and fresh sauces. And if you want a seafood appetizer to start, our Cantabrian anchovies start any meal on the right foot.

Frequently asked questions

What is the best sauce for grilled cod?
It depends on taste. Green sauce and light pil pil are the most classic and respect the fish's flavor; Romesco and Vizcaína add more body; bell pepper vinaigrette is the freshest and lightest. For a thick and juicy fillet, an oil emulsion (pil pil or beurre blanc) works very well.

Is the sauce served on top or underneath the cod?
Ideally, it should be served underneath or beside, not excessively on top. This way, the cod retains its seared and crispy surface, and each bite is dipped in the sauce without the fillet becoming soggy.

Can I prepare the sauces in advance?
Yes. Vizcaína, Romesco, roasted garlic mayonnaise, and vinaigrette keep well in the refrigerator for 2-3 days. Pil pil and beurre blanc are delicate emulsions: it's better to make them fresh and serve them warm, as strong heat can curdle them.

What oil do I use for the sauces?
Extra virgin olive oil for Mediterranean-style sauces (pil pil, ajada, green sauce, Romesco, vinaigrette). For mayonnaise, a mild oil (sunflower or blend) is better to prevent bitterness. Beurre blanc uses butter, not oil.

Do I need to desalt the cod before grilling it?
Yes, unless you buy it already desalted. The salt level is key: an overly salty fillet will unbalance any sauce. Follow the desalting times according to the thickness of the fillet before grilling it.